/*
 * @brief This file contains Systick handler and millisecond timer routines.
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2013
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */
#include "board.h"
#include "ms_timer.h"

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

volatile uint32_t g_msTicks;		/** counts 1ms timeTicks */

/*****************************************************************************
 * Private functions
 ****************************************************************************/

/*****************************************************************************
 * Public functions
 ****************************************************************************/

/**
 * @brief	SysTick IRQ handler
 * @return	None.
 */
void SysTick_Handler(void)
{
	g_msTicks++;						/* increment counter necessary in Delay() */
}

/**
 * @brief	Waits for given number of milliseconds
 * @param	n	: Number of milliseconds
 * @return	Nothing
 */
void ms_timerDelay(uint32_t n)
{
	ms_timer_t  timer;

	ms_timerInit(&timer, n);

	while (ms_timerExpired(&timer) == false) {
		__NOP();
		__WFI();/* conserve power */
	}

}
